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Convertible Promissory Note Payable - Additional Information (Detail)
¥ in Thousands
Oct. 08, 2015
$ / shares
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Oct. 31, 2015
CNY (¥)
Oct. 31, 2015
$ / shares
Oct. 01, 2015
Convertible Promissory Note Payable [Line Items]            
Notes issued | ¥   ¥ 10,669,498 ¥ 10,117,188      
Loan interest rate   125.00%        
Par value per share | $ / shares $ 0.00001          
Maturity Date Oct. 08, 2023          
Sale of Stock Price Per Share | $ / shares $ 14.8869          
Percentage of Conversion of Debt to Equity 100.00%          
Ping an group [Member]            
Convertible Promissory Note Payable [Line Items]            
Notes issued | ¥       ¥ 1,953,800    
Loans received | ¥       ¥ 937,800    
Loan interest rate           0.7375%
Conversion Of Debt To Equity conversion price | $ / shares         $ 14.8869